Here’s a blog post about emotion vs. intellect in fiction. Specifically YA and MG fiction, in this case.
What interested me most, strangely enough, was the classification of genres as Adrenaline, Emotional, Intellectual, and Landscape. I wonder whether these don’t correspond to the predominance of certain elements of fiction, namely (in the same order) plot, character, theme (or ideas), and setting. Novels should have all of these, of course, but I’m sure readers (and writers too) feel consistently drawn to some elements more than others.